12x^2-x-36=0

Simple and best practice solution for 12x^2-x-36=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 12x^2-x-36=0 equation:


Simplifying
12x2 + -1x + -36 = 0

Reorder the terms:
-36 + -1x + 12x2 = 0

Solving
-36 + -1x + 12x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
12 the coefficient of the squared term: 

Divide each side by '12'.
-3 + -0.08333333333x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -0.08333333333x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -0.08333333333x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -0.08333333333x + x2 = 0 + 3
-0.08333333333x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-0.08333333333x + x2 = 3

The x term is -0.08333333333x.  Take half its coefficient (-0.04166666667).
Square it (0.001736111111) and add it to both sides.

Add '0.001736111111' to each side of the equation.
-0.08333333333x + 0.001736111111 + x2 = 3 + 0.001736111111

Reorder the terms:
0.001736111111 + -0.08333333333x + x2 = 3 + 0.001736111111

Combine like terms: 3 + 0.001736111111 = 3.001736111111
0.001736111111 + -0.08333333333x + x2 = 3.001736111111

Factor a perfect square on the left side:
(x + -0.04166666667)(x + -0.04166666667) = 3.001736111111

Calculate the square root of the right side: 1.732551907

Break this problem into two subproblems by setting 
(x + -0.04166666667) equal to 1.732551907 and -1.732551907.

Subproblem 1

x + -0.04166666667 = 1.732551907 Simplifying x + -0.04166666667 = 1.732551907 Reorder the terms: -0.04166666667 + x = 1.732551907 Solving -0.04166666667 + x = 1.732551907 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.04166666667' to each side of the equation. -0.04166666667 + 0.04166666667 + x = 1.732551907 + 0.04166666667 Combine like terms: -0.04166666667 + 0.04166666667 = 0.00000000000 0.00000000000 + x = 1.732551907 + 0.04166666667 x = 1.732551907 + 0.04166666667 Combine like terms: 1.732551907 + 0.04166666667 = 1.77421857367 x = 1.77421857367 Simplifying x = 1.77421857367

Subproblem 2

x + -0.04166666667 = -1.732551907 Simplifying x + -0.04166666667 = -1.732551907 Reorder the terms: -0.04166666667 + x = -1.732551907 Solving -0.04166666667 + x = -1.732551907 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.04166666667' to each side of the equation. -0.04166666667 + 0.04166666667 + x = -1.732551907 + 0.04166666667 Combine like terms: -0.04166666667 + 0.04166666667 = 0.00000000000 0.00000000000 + x = -1.732551907 + 0.04166666667 x = -1.732551907 + 0.04166666667 Combine like terms: -1.732551907 + 0.04166666667 = -1.69088524033 x = -1.69088524033 Simplifying x = -1.69088524033

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.77421857367, -1.69088524033}

See similar equations:

| 5(1-2n)=85 | | -33=-3(2-3x) | | 1k=2k-1 | | 36x^2-476x-2459=0 | | 6.4(2k+3)=19.2 | | 8x-26=6x+66 | | 2(1r+8r-6)=0 | | -238=-2+4(8x+5) | | (9x^3-4x^2+3x)+(4x^3+9x^2-13x)= | | 1+-2x=-9 | | 1p-5+3p=15 | | 3-5x=-7 | | 100x^2-60x+9=0 | | 4528495354-389-9084589-045890-4589-4505439824538904589-3894-508495-3340=7x/3333y*444444y-333z | | 60z+60= | | 56x+4535438543845387y=37 | | 8(2v+6)=96 | | -1/2x+8=28 | | 81+144=x | | 1.50+1.50y=21 | | d/3-5=-10 | | -3b+3(-2b-3)=-36 | | 9r^2+15r=-6 | | 3(8-8k)=-96 | | X+5x/3=32 | | 4x+8=-8x+33 | | -4x-8=-8x+3 | | -7(2x+6)=-112 | | 2*24=3y+1*y+1 | | 72w^5-56w^4+32w^3/-8w^2 | | 8x+7y=15 | | -8b-b=9 |

Equations solver categories